Refactor the Dashboard page

[jhodapp]

Description

This PR refactors the Dashboard page removing unnecessary components and improving the CoachingSessionList component to display upcoming/previous sessions in two different tabs.

It also improves the logout robustness, but a separate PR will be necessary to fully address #101

Note

1. @calebbourg's PR Update coaching sessions #96 must land first.
2. Also, this backend PR must also land to ensure logout works well

GitHub Issue: Closes #87

Changes

• Removes the SelectCoachingRelationship component from the Dashboard page
• Moves CoachingSessionList left and widens it to the full page width
• Adds a tab bar splitting sessions out by upcoming/previous sessions in the CoachingSessionList component
• Move the CoachingSessionSelector into the CoachingSessionList
• Addresses some of the logout robustness issues which was necessary to fully test the placeholder text of the CoachingSessionSelector component

Screenshots / Videos Showing UI Changes (if applicable)

No relationship selected:

Relationship selected, upcoming sessions:

Relationship selected, previous sessions:

Testing Strategy

1. Login as a user
2. Notice the new CoachingSessionList component changes on the Dashboard page that should look like in the screenshots
3. Notice that the SelectCoachingRelationship component is now removed from the Dashboard page
4. Logout should work in every circumstance except for when the backend is down/unreachable

Concerns

None

[jhodapp]

Replaced by #104.